Home / 1,332.48-1,838.40-918.72

Finding the Fourth Proportional to 1,332.48, 1,838.40 and 918.72

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Solution

The fourth proportional to 1,332.48, 1,838.40 and 918.72 is: 1,267.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,332.48 : 1,838.40 = 918.72 : x
  2. Step 2: Convert to fraction form
    1,332.48/1,838.40 = 918.72/x
  3. Step 3: Cross multiply
    1,332.48x = 1,838.40 × 918.72
  4. Step 4: Simplify right side
    1,332.48x = 1,688,974.85
  5. Step 5: Solve for x
    x = 1,688,974.85/1,332.48
  6. Step 6: Final answer
    x = 1,267.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.